text: import QuadraticEdge from 'graph2/element/QuadraticEdge.js';
  
  export const SYMBOL_SEPARATOR = ' ';
  export const EMPTY_CHAR = '\u03B5';
  
  class FSAEdge extends QuadraticEdge
  {
      constructor(id, from, to = null)
      {
          super(id, from, to);
      }
  
      /** @override */
      setEdgeLabel(label)
      {
          if (typeof label === 'string')
          {
              super.setEdgeLabel(label);
          }
          else
          {
              super.setEdgeLabel(EMPTY_CHAR);
          }
      }
  }
  
  export default FSAEdge;
  